STAT 217- Final Exam Guide - Comprehensive Notes for the exam ( 25 pages long!)
29 Mar 2018
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STAT 217 Full Course Notes
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Mode: most common value occurring, only measure that can be used for nominal. Median: middle score of any variable when values are ordered, can be used with ordinal or higher level of measurement. Mean: most common measure of central tendency. 2 of values in the sample minus 1 (n-1) which is called the variance s^2: and then to get the standard deviation square root s^2 (variance) Step 1: determine x and y variables. Step 2: calculate the mean of x and y (mean= f/n) Step 3: calculating distances from the mean (xi-mean) Step 5: calculate covariance (add them up) Step 6: input the values into the equation to solve for b. Step 7: input the mean values of x and y to solve a. If it is unlikely to not reproduce our results, we reject the idea that there are no relationships in the population: hypothesis testing is based on the sampling distribution of means.
